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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use crate::dom::baseaudiocontext::BaseAudioContext;
use crate::dom::bindings::codegen::Bindings::AudioParamBinding;
use crate::dom::bindings::codegen::Bindings::AudioParamBinding::{AudioParamMethods, AutomationRate};
use crate::dom::bindings::num::Finite;
use crate::dom::bindings::reflector::{Reflector, reflect_dom_object};
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::window::Window;
use dom_struct::dom_struct;
use servo_media::audio::graph::NodeId;
use servo_media::audio::node::AudioNodeMessage;
use servo_media::audio::param::{ParamRate, ParamType, RampKind, UserAutomationEvent};
use std::cell::Cell;
use std::sync::mpsc;
#[dom_struct]
pub struct AudioParam {
reflector_: Reflector,
context: Dom<BaseAudioContext>,
#[ignore_malloc_size_of = "servo_media"]
node: NodeId,
#[ignore_malloc_size_of = "servo_media"]
param: ParamType,
automation_rate: Cell<AutomationRate>,
default_value: f32,
min_value: f32,
max_value: f32,
}
impl AudioParam {
pub fn new_inherited(
context: &BaseAudioContext,
node: NodeId,
param: ParamType,
automation_rate: AutomationRate,
default_value: f32,
min_value: f32,
max_value: f32,
) -> AudioParam {
AudioParam {
reflector_: Reflector::new(),
context: Dom::from_ref(context),
node,
param,
automation_rate: Cell::new(automation_rate),
default_value,
min_value,
max_value,
}
}
#[allow(unrooted_must_root)]
pub fn new(
window: &Window,
context: &BaseAudioContext,
node: NodeId,
param: ParamType,
automation_rate: AutomationRate,
default_value: f32,
min_value: f32,
max_value: f32,
) -> DomRoot<AudioParam> {
let audio_param = AudioParam::new_inherited(
context,
node,
param,
automation_rate,
default_value,
min_value,
max_value,
);
reflect_dom_object(Box::new(audio_param), window, AudioParamBinding::Wrap)
}
fn message_node(&self, message: AudioNodeMessage) {
self.context
.audio_context_impl()
.message_node(self.node, message);
}
pub fn context(&self) -> &BaseAudioContext {
&self.context
}
pub fn node_id(&self) -> NodeId {
self.node
}
pub fn param_type(&self) -> ParamType {
self.param
}
}
impl AudioParamMethods for AudioParam {
// https://webaudio.github.io/web-audio-api/#dom-audioparam-automationrate
fn AutomationRate(&self) -> AutomationRate {
self.automation_rate.get()
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-automationrate
fn SetAutomationRate(&self, automation_rate: AutomationRate) {
self.automation_rate.set(automation_rate);
self.message_node(AudioNodeMessage::SetParamRate(
self.param,
automation_rate.into(),
));
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-value
fn Value(&self) -> Finite<f32> {
let (tx, rx) = mpsc::channel();
self.message_node(AudioNodeMessage::GetParamValue(self.param, tx));
Finite::wrap(rx.recv().unwrap())
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-value
fn SetValue(&self, value: Finite<f32>) {
self.message_node(AudioNodeMessage::SetParam(
self.param,
UserAutomationEvent::SetValue(*value),
));
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-defaultvalue
fn DefaultValue(&self) -> Finite<f32> {
Finite::wrap(self.default_value)
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-minvalue
fn MinValue(&self) -> Finite<f32> {
Finite::wrap(self.min_value)
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-maxvalue
fn MaxValue(&self) -> Finite<f32> {
Finite::wrap(self.max_value)
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-setvalueattime
fn SetValueAtTime(&self, value: Finite<f32>, start_time: Finite<f64>) -> DomRoot<AudioParam> {
self.message_node(AudioNodeMessage::SetParam(
self.param,
UserAutomationEvent::SetValueAtTime(*value, *start_time),
));
DomRoot::from_ref(self)
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-linearramptovalueattime
fn LinearRampToValueAtTime(
&self,
value: Finite<f32>,
end_time: Finite<f64>,
) -> DomRoot<AudioParam> {
self.message_node(AudioNodeMessage::SetParam(
self.param,
UserAutomationEvent::RampToValueAtTime(RampKind::Linear, *value, *end_time),
));
DomRoot::from_ref(self)
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-exponentialramptovalueattime
fn ExponentialRampToValueAtTime(
&self,
value: Finite<f32>,
end_time: Finite<f64>,
) -> DomRoot<AudioParam> {
self.message_node(AudioNodeMessage::SetParam(
self.param,
UserAutomationEvent::RampToValueAtTime(RampKind::Exponential, *value, *end_time),
));
DomRoot::from_ref(self)
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-settargetattime
fn SetTargetAtTime(
&self,
target: Finite<f32>,
start_time: Finite<f64>,
time_constant: Finite<f32>,
) -> DomRoot<AudioParam> {
self.message_node(AudioNodeMessage::SetParam(
self.param,
UserAutomationEvent::SetTargetAtTime(*target, *start_time, (*time_constant).into()),
));
DomRoot::from_ref(self)
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-cancelscheduledvalues
fn CancelScheduledValues(&self, cancel_time: Finite<f64>) -> DomRoot<AudioParam> {
self.message_node(AudioNodeMessage::SetParam(
self.param,
UserAutomationEvent::CancelScheduledValues(*cancel_time),
));
DomRoot::from_ref(self)
}
// https://webaudio.github.io/web-audio-api/#dom-audioparam-cancelandholdattime
fn CancelAndHoldAtTime(&self, cancel_time: Finite<f64>) -> DomRoot<AudioParam> {
self.message_node(AudioNodeMessage::SetParam(
self.param,
UserAutomationEvent::CancelAndHoldAtTime(*cancel_time),
));
DomRoot::from_ref(self)
}
}
// https://webaudio.github.io/web-audio-api/#enumdef-automationrate
impl From<AutomationRate> for ParamRate {
fn from(rate: AutomationRate) -> Self {
match rate {
AutomationRate::A_rate => ParamRate::ARate,
AutomationRate::K_rate => ParamRate::KRate,
}
}
}
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